Dali 3D User Interface Engine
fps-tracker.cpp
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1 /*
2  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 
18 // CLASS HEADER
19 #include "fps-tracker.h"
20 
21 // EXTERNAL INCLUDES
22 #include <cstdio>
23 #include <cmath>
24 
25 // INTERNAL INCLUDES
27 
28 namespace Dali
29 {
30 
31 namespace Internal
32 {
33 
34 namespace Adaptor
35 {
36 
37 namespace
38 {
39 const char* DALI_TEMP_UPDATE_FPS_FILE( "/tmp/dalifps.txt" );
40 } // unnamed namespace
41 
42 FpsTracker::FpsTracker( const EnvironmentOptions& environmentOptions )
43 : mFpsTrackingSeconds( fabsf( environmentOptions.GetFrameRateLoggingFrequency() ) ),
44  mFrameCount( 0.0f ),
45  mElapsedTime( 0.0f )
46 {
47 }
48 
50 {
51  if( mFpsTrackingSeconds > 0.f )
52  {
54  }
55 }
56 
57 void FpsTracker::Track( float secondsFromLastFrame )
58 {
59  if( mFpsTrackingSeconds > 0.f )
60  {
62  {
63  mElapsedTime += secondsFromLastFrame;
64  mFrameCount += 1.f;
65  }
66  else
67  {
69  mFrameCount = 0.f;
70  mElapsedTime = 0.f;
71  }
72  }
73 }
74 
75 bool FpsTracker::Enabled() const
76 {
77  return mFpsTrackingSeconds > 0.0f;
78 }
79 
81 {
82  float fps = mFrameCount / mElapsedTime;
83  DALI_LOG_FPS("Frame count %.0f, elapsed time %.1fs, FPS: %.2f\n", mFrameCount, mElapsedTime, fps );
84 
85  // Dumps out the frame rate.
86  FILE* outfile = fopen( DALI_TEMP_UPDATE_FPS_FILE, "w" );
87  if( outfile )
88  {
89  char fpsString[10];
90  snprintf(fpsString,sizeof(fpsString),"%.2f \n", fps );
91  fputs( fpsString, outfile ); // ignore the error on purpose
92  fclose( outfile );
93  }
94 }
95 
96 } // namespace Adaptor
97 
98 } // namespace Internal
99 
100 } // namespace Dali
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